How popular is Ignacio?

Ignacio is a very popular first name for men (#439 out of 1220, Top 36%) and also a very popular surname for all people (#7017 out of 150436, Top 5%). (2000 U.S. Demographics)

Ignacio reached its peak position of #567 in the U.S. in the 1920s, and is presently at #925. (2015 U.S. SSA Records)

Which version is better?

with its source form and related boy names. Ignazio, Ignatius and Ignatz are the prominent varying forms of Ignacio (#925 via latest list) appearing in the Top 2000. Other forms, like Ignace, are uncommon. Usage of these forms of Ignacio reached its highest a century ago and is somewhat less today. Ignacio is the most contemporarily stylish baby name in this list.